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Definition
By Mayo Clinic staffBreast cysts are fluid-filled sacs within your breast. You can have one or many breast cysts. They're often described as round or oval lumps with distinct edges. In texture, a breast cyst usually feels like a soft grape or a water-filled balloon, but sometimes a breast cyst feels firm.
Breast cysts are common in women in their 30s and 40s. If you have breast cysts, they usually disappear after menopause, unless you're taking hormone therapy.
Breast cysts don't require treatment unless a cyst is large and painful or otherwise uncomfortable. In that case, draining the fluid from a breast cyst can ease your symptoms.
